code: def test_run_in_subprocess(self):
      # Serialization of a built in function
      self.assertEqual(run_in_subprocess(builtin_func), builtin_func())
  
      # Arg passing
      self.assertEqual(run_in_subprocess(multiply, 2, 3), 6)
  
file_path: petastorm/petastorm/tests/test_run_in_subprocess.py
imports: import unittest
  from functools import partial
  from petastorm.unischema import dict_to_spark_row, Unischema
  from petastorm.utils import run_in_subprocess
label_desc: Use image node_id 1 for calling the RunInSubprocessTest obj's underlying member method code with example usage: obj.test_run_in_subprocess() without return types